# strprint.py
print('i told you,"pythin is good."')
print("i told you,'pythin is good.'")
print("i told you,\"pythin is good.\",\'it is terrific\'")
# 常用转义字符
print("i know many popular programming languages as follow:\n\tjavascript\n\tpython\n\tc\n\tc++\n\truby")
# 大小写转换
sName = "huang zheng human"
print(sName.title())

sName = "zhang jia yi"
print(sName.upper())
print(sName.lower())